Fever thermometer

Abstract

A fever thermometer having an adhesive on one side of a flexible backing web for adhering the web to the skin of the human body, the web being provided with a background color, and having a plurality of numerical display areas on the opposite side of the web, each numerical display area including an encapsulated liquid crystal indicator, the color spectrum of each liquid crystal indicator being responsive to a different specific temperature range, and the liquid crystal indicators being initially of a color to compliment the background color so as to be substantially invisible at temperatures below the minimum threshold temperature of the indicator having the lowest temperature range. A directional indicator is provided on the opposite side of the web for enabling adherence of the web the numerical display areas in a predetermined attitude when the numerical display areas are substantially invisible at temperatures below the minimum threshold temperature so that the numerical display areas can be easily read when made visible at temperatures within the responsive temperature ranges of the liquid crystal indicators. The directional indicator is of a color contrasting with the background color so as to be visible at all times.

I claim as my invention: 
     
       1. A fever thermometer, comprising: (a) a flexible web,   (b) an adhesive on the web for securing the web to the skin of the human body.   (c) a plurality of numerical display areas on the web having a predetermined attitude so as to be read easily when the web is adhered in a predetermined directional attitude, each numerical display area including an encapsulated liquid crystal indicator, the color spectrum of each liquid crystal indicator being responsive to a different specific temperature range, and the liquid crystal indicators being of a color to be substantially invisible at temperatures not within the responsive temperature ranges of the liquid crystal indicators, and   (d) a directional indicator on the web for enabling adherence of the web in the predetermined directional attitude with the numerical display areas in their predetermined attitude when the numerical display areas are substantially invisible at temperatures not within the responsive temperature ranges of the liquid crystal indicators so that the numerical display areas can be easily read when made visible at temperatures within the responsive temperature ranges of the liquid crystal indicators.